#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define rep(i, a, b) for (int i = (a); i <= (b); i++)
#define per(i, a, b) for (int i = (a); i >= (b); i--)
#define endl '\n'
const int N = 105;

int n, m;
int a[N];
bool check() {
  rep(i, 2, n) if (1ll * a[i] * a[1] != 1ll * a[2] * a[i - 1]) return false;
  return true;
}
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  cin >> n;
  rep(i, 1, n) cin >> a[i];
  bool res = check();
  cout << (res ? "Yes" : "No");
  return 0;
}